I think you meant "not" enough. Don't foget:
Brake pads: Make sure the pad compound up to the task and that there is enough material to get you through the weekend? You'll want to make sure the fluid is up to the task as well, and be prepared to bleed all four corners at least once during the weekend (so take the necessary tools and extra fluid).

There is more, but probably none as important.

Side note: If you have time, get the alignment checked before you go. That way, if you discover any unwanted tendencies during the event, you'll know what direction to take for corrective actions.